Mitsubishi MELSEC-F FX3U Series User Manual

F-23
5 Troubleshooting
5.4 Program Check
FX 3U /FX 3UC Series PLC User's Manual - Analog Control Edition
FX3U-4AD-TC-ADP (4-channel Thermocouple Data Input)
A
Common Items
B
FX
3UC
-4AD
C
FX
3U
-4AD-ADP
D
FX
3U
-4DA-ADP
E
FX
3U
-4AD-PT
-ADP
F
FX
3U
-4AD-TC
-ADP
G
PID Instruction (FNC 88)
5.4 Program Check
Check the following items for a program:
1. Cancellation of error status at power-on
When the power is turned off and then on again, the error status should be cleared (the b6 and the b7 should
be turned off) using the program.
2. Check of storage devices
Check that different digital values are not stored in the same device in the other programs.
5.5 Error Status Check
If an error occurs on TC-ADP, the corresponding bit will be turned on.
To solve a problem, refer to the troubleshooting method described below:
1. Temperature measurement out of specified range or disconnection of line (b0 to b3)
1) Description of error
The input temperature measurement value is outside the specified range.
The temperature measurement value of thermocouple type K is not in the range from -110
°
C
to +1010
°
C
,
or the temperature measurement value of thermocouple type J is not in the range from -110
°
C
to +610
°
C
.
Or the line between TC-ADP and the thermocouple is disconnected.
2) Remedy
Check that the input temperature measurement value is within the specified range.
Also check the wiring condition.
2. EEPROM error (b4)
1) Description of error
The adjustment data set in the EEPROM before delivery from our factory is unreadable or is destroyed.
2) Remedy
Please contact the nearest Mitsubishi Electric distributor office.
3. Number of averaging time setting error (b5)
1) Description of error
The number of averaging time set for one of the channels (channels 1 to 4) is outside the specified range:
1 to 4095.
2) Remedy
Check that the number of averaging time is correctly set for each channel.
Bit Description Bit Description
b0
The temperature measurement data in
channel 1 is outside the specified
range, or disconnection is detected.
b5 Number of averaging time setting error
b1
The temperature measurement data in
channel 2 is outside the specified
range, or disconnection is detected.
b6 TC-ADP hardware error
b2
The temperature measurement data in
channel 3 is outside the specified
range, or disconnection is detected.
b7 TC-ADP communication data error
b3
The temperature measurement data in
channel 4 is outside the specified
range, or disconnection is detected.
b8 to b15 Unused
b4 EEPROM error - -

Mitsubishi MELSEC-F FX3U Series Specifications

General

Brand	Mitsubishi
Model	MELSEC-F FX3U Series
Category	Controller
Language	English